Soft package lithium ion battery tab connector and connecting method

Abstract

The invention is applicable to the technical field of lithium ion batteries, and provides a soft package lithium ion battery tab connector and a connecting method. The connector comprises a connectingband and connecting pieces, the plurality of connecting pieces are connected to the surface of the connecting band in the length direction, the connecting pieces are arranged in pairs, each pair of connecting pieces comprises a son connecting piece and a mother connecting piece, one side of the son connecting piece is connected with one side of the mother connecting piece, the side is connected with the surface of the connecting band, a plurality of bosses are arranged along the other side of the son connecting piece, a plurality of first round holes are formed along the other side of the mother connecting piece, and the diameter of the first round holes is slightly smaller than that of the front ends of the bosses. According to the invention, the connector and a tab are crimped and fixed, the connector has the advantages of small occupied space and light weight, the connection between the connector and the tab is firm and good in reliability and cannot be loosened in the use process,and for a soft package lithium ion battery module manufactured by adopting the connector, there is no need to fix each single battery cell by an outer frame, only the whole module needs to be fixed,and the production efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a soft-pack lithium-ion battery lug connector and a connection method. Background technique [0002] Soft-pack lithium-ion batteries are widely used in the fields of electric vehicles and electric energy storage due to their light weight and easy size change. However, due to their soft shells, a large amount of auxiliary support materials are often required to ensure its performance. In addition, the lug connection method of the soft-packed lithium-ion battery includes welding the lug to the hard copper bar through the transfer of aluminum nickel, fixing it to the hard copper bar through bolts, welding the tab to the top of the plastic frame with a plastic frame structure, or , put the battery into the aluminum shell or steel shell and re-weld the pole, but these methods will bring a lot of troubles, not only low production efficiency, easy to loosen, p...

AI Technical Summary

Problems solved by technology

[0004] The application number is CN201810142053.5, the patent "Soft Pack Lithium-ion Battery Module and Electric Vehicle" installs a pressure plate on the tab, and the pressure plate presses the bus bar and the tab tightly through bolts, but the bolt connection method is easy to be damaged during long-term use. Vibration and loosening, which will bring safety hazards

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